1,100 research outputs found

    Interferon Side Effects: When Somatization Betrays You - A Case Report

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    Neuropsychiatric symptoms are widely reported in association with both hepatitis C and IFNα treatment [1]its sequelae, and its treatment. In particular, interferon, a primary component of treatment for chronic hepatitis C, has been strongly associated with depressive symptoms. This review summarizes current knowledge about the etiology, course, and treatment of europsychiatric problems associated with hepatitis C and interferon alpha (IFN-alpha and lead to discontinuation of interferon in up to 13% of cases [2]. When on interferon treatment, cognitive, affective and behavioral symptoms are not easily distinguished from each other or from depression [2,3] mechanism, course, and treatment of neuropsychiatric problems associated with interferon alfa (IFN-alpha. The challenge is even higher if in somatoform cases. We describe a case of somatoform disorder while on classic therapy for hepatitis C and discuss the management of the patient main complaints and evolution

    Exuberant emphysema in HIV-Infected patient

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    Genetic variability of Mahanarva sp (Hemiptera: Cercopidae) collected from different sites in Brazil.

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    Spittlebugs are the leading cause of damage to tall grasses. Annual losses are estimated to reach 2.1 billion dollars in sugarcane crops and grazing land throughout the world. Correct identification of these species is difficult due to similarities in color, body size and male genitalia. Molecular markers have been useful in the identification and assessment of genetic diversity of many species. We investigated the genetic diversity of the spittlebug species Mahanarva fimbriolata, M. spectabilis and M. liturata and looked for markers that could aid in their identification. DNA from 34 spittlebug specimens, collected from six different regions of Brazil (Brasília, Campo Grande, Valença, Presidente Prudente, Juiz de Fora, and Porto Alegre), was analyzed with 29 RAPD primers, generating 501 polymorphic markers. High genetic variability was found among individuals M. fimbriolata (0.37), M. spectabilis (0.18) and M. liturata (0.69). Species-specific molecular RAPD markers were identified for each of the three species; these could be used as auxiliary tools for their correct identification

    Fitodisponibilidade de nitrogênio em solo adubado com fertilizante mineral ou lodo de esgoto.

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    Com a publicação da Política Nacional de Resíduos Sólidos, o lodo de esgoto não poderá ser mais disposto em aterros sanitários. Assim, o uso agrícola se torna ainda mais atrativo. Embora a aplicação deste resíduo ao solo seja normatizada, alguns pontos ainda são questionados, destacando-se a dose calculada a partir da mineralização de nitrogênio quando é realizada mais de uma aplicação ao solo. Portanto, este estudo foi realizado com o objetivo de avaliar a disponibilidade de nitrogênio para plantas de milho em solos previamente tratados com lodo de esgoto. As avaliações foram realizadas em experimento de longo prazo, iniciado em 2001, no qual vem sendo realizada adubação com NPK, dose recomendada de lodo de esgoto ou o dobro desta dose. Concluiu-se que: (i) o teor e a quantidade absorvida de nitrogênio por plantas de milho em solo tratado sucessivamente com a dose recomendada de lodo de esgoto são maiores do que quando é realizada a adubação com NPK; (ii) a quantidade de N absorvida por plantas de milho cultivadas em solo com o dobro da dose recomendada não difere da quantidade absorvida com a adição da dose recomendada, indicando excesso de nitrogênio no solo e maior potencial de contaminação e (iii) a adição do dobro da dose recomendada de lodo de esgoto não resulta em maior produção de massa seca e produtividade quando comparada com a dose recomendada

    Disponibilidade de nitrogênio para plantas de milho cultivadas em solo tratado com doses de lodo de esgoto.

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    O uso de lodo de esgoto como fertilizante orgânico é uma interessante opção de disposição deste resíduo sólido urbano. Uma das recomendações de cálculo de dose baseia-se na disponibilidade de nitrogênio presente no lodo de esgoto. Ainda existem dúvidas quanto a esta recomendação no que se referem a solos que foram tratados sucessivamente com este resíduo. Este trabalho teve como objetivo estudar a fitodisponibilidade de nitrogênio em solo tratado com lodo de esgoto desde 1999, por meio da avaliação do teor e quantidade absorvida de nitrogênio e produção de massa seca e produtividade de milho. Os tratamentos consistiram na adição de doses crescentes de lodo de esgoto: sem o resíduo, dose recomendada, duas e oito vezes a dose recomendada. A quantidade de nitrogênio (N) absorvida pelas plantas de milho superou a quantidade disponível estimada por meio de cálculo seguindo-se a Resolução 375. No entanto, incrementos na absorção de N e na produtividade da cultura foram observados até dose correspondente a cinco vezes a recomendada, o que significa que a mineralização do Nremanescente de aplicações anteriores não foi suficiente para garantir a produtividade máxima nas condições do estudo. Abstract: The use of sewage sludge as an organic fertilizer is an interesting option for disposal of this urban solid waste. One of the doses calculations is based on sewage sludge nitrogen availability. There are doubts about the suitability of this recommendation for soils treated consecutively with this residue. The objective of this study was to investigate nitrogen phytoavailability in soils treated consecutively with sewage sludge (since 1999) through the evaluation of nitrogen concentration and absorption by corn plants and dry matter and grain production. The treatments consisted on application of increasing doses of sewage sludge. Nitrogen quantity absorbed by maize plants overcame the available quantity estimated following Conama’s Resolution. However, increases on nitrogen absorption and maize productivity were observed until the addition of 5 times the recommended dose. Therefore, the mineralization of nitrogen reminiscent from previous applications was not sufficient to guarantee maximum productivity on the study conditions

    Desempenho agronômico de grupos de cultivares de alface sistema orgânico no Distrito Federal.

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    Este trabalho teve com objetivo avaliar o desempenho agronômico de cultivares de alface crespa, lisa e americana cultivadas em sistema orgãnico.Trabalho apresentado no 4. Seminário de Agroecologia do Distrito Federal e Entorno, Brasília, DF

    Modelling the radiative effects of biomass burning aerosols on carbon fluxes in the Amazon region

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    Every year, a dense smoke haze covers a large portion of South America originating from fires in the Amazon Basin and central parts of Brazil during the dry biomass burning season between August and October. Over a large portion of South America, the average aerosol optical depth at 550 nm exceeds 1.0 during the fire season, while the background value during the rainy season is below 0.2. Biomass burning aerosol particles increase scattering and absorption of the incident solar radiation. The regional-scale aerosol layer reduces the amount of solar energy reaching the surface, cools the near-surface air, and increases the diffuse radiation fraction over a large disturbed area of the Amazon rainforest. These factors affect the energy and CO2 fluxes at the surface. In this work, we applied a fully integrated atmospheric model to assess the impact of biomass burning aerosols in CO2 fluxes in the Amazon region during 2010. We address the effects of the attenuation of global solar radiation and the enhancement of the diffuse solar radiation flux inside the vegetation canopy. Our results indicate that biomass burning aerosols led to increases of about 27 % in the gross primary productivity of Amazonia and 10 % in plant respiration as well as a decline in soil respiration of 3 %. Consequently, in our model Amazonia became a net carbon sink; net ecosystem exchange during September 2010 dropped from +101 to −104 TgC when the aerosol effects are considered, mainly due to the aerosol diffuse radiation effect. For the forest biome, our results point to a dominance of the diffuse radiation effect on CO2 fluxes, reaching a balance of 50–50 % between the diffuse and direct aerosol effects for high aerosol loads. For C3 grasses and savanna (cerrado), as expected, the contribution of the diffuse radiation effect is much lower, tending to zero with the increase in aerosol load. Taking all biomes together, our model shows the Amazon during the dry season, in the presence of high biomass burning aerosol loads, changing from being a source to being a sink of CO2 to the atmosphere
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